JP6385146B2 - Drum washing machine - Google Patents

Description

  The present invention relates to a drum type washing machine. Such a drum-type washing machine may be one that performs continuously from washing to drying, or one that performs washing but does not dry.

  Conventionally, a drum-type washing machine rotates a horizontal axis drum in an outer tub with water stored in the bottom, lifts and drops the laundry by a baffle provided in the drum, and the laundry is moved to the inner periphery of the drum. Laundry is performed by hitting the surface (see Patent Document 1).

  As described above, in the configuration in which the laundry is stirred by the baffle, the laundry is unlikely to be entangled or rubbed with each other. For this reason, the drum-type washing machine tends to have a smaller mechanical force acting on the laundry and lower the washing performance than a fully automatic washing machine that rotates the pulsator in the washing and dewatering tub to wash the laundry.

  Therefore, in the drum type washing machine, in order to improve the cleaning performance, it is possible to employ a configuration in which a stirring body is provided on the rear surface of the drum and the drum and the stirring body are separately rotated at different rotational speeds when it is easy to wash.

JP 2013-240577 A

  When washing is performed, the laundry is often put in a drum in a dry state. When a lot of dry laundry is stored in the drum, the laundry may be compressed between the door on the front surface of the drum and the agitator on the rear surface of the drum, and the agitator may be pressed by the laundry. . Moreover, when the laundry is in a dry state, the friction coefficient is larger than when the laundry is in a wet state. Therefore, when the drum and the stirrer are separately rotated in a state where the stirrer is pressed by the dry laundry, a large load is applied to the stirrer and the drive motor that drives the stirrer is provided. There is a risk of locking.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a drum-type washing machine capable of preventing the occurrence of problems such as malfunction of a drive unit while improving the cleaning performance.

  A main aspect of the present invention relates to a drum type washing machine that performs a washing operation including a washing step, a rinsing step, and a dehydrating step. The drum type washing machine according to the present aspect includes an outer tub disposed in a housing, a water supply unit that supplies water into the outer tub, and the outer tub disposed in the outer tub, and is inclined with respect to a horizontal axis or a horizontal direction. A drum that is rotatable about an inclined axis, a rotating body that is disposed at the rear of the drum and has a protrusion on the surface that contacts the laundry, and the rotating speed of the rotating body is higher than the rotating speed of the drum. A two-axis drive mode in which the drum and the rotating body are rotated separately, and a single-axis drive in which the drum and the rotating body are rotated integrally so that the rotating speed of the rotating body is equal to the rotating speed of the drum. Depending on the form, a drive unit capable of rotating the drum and the rotating body, and a control unit for controlling the operation of the drive unit are provided. Here, in the washing step, the control unit causes water to be supplied into the drum by water supply from the water supply unit before causing the drive unit to rotate the drum and the rotating body according to the biaxial drive mode. In the accumulated state, the driving unit is caused to rotate the drum and the rotating body according to the uniaxial driving mode.

  According to said structure, after the laundry gets wet with the water in a drum and the bulk and friction coefficient of a laundry reduce, the drum and rotary body by a biaxial drive form can be rotated. Thereby, it can prevent that the excessive load by laundry is applied to a rotary body, and can prevent that a malfunction arises in a drive part, such as a motor lock.

  In the drum type washing machine according to this aspect, the drive unit detects the drive mode and a clutch mechanism unit that switches the drive mode of the drive unit between the biaxial drive mode and the uniaxial drive mode. And a detector. In this case, the control unit operates the clutch mechanism unit so as to be switched to the uniaxial drive mode at the end of the washing operation, and the drum and the rotation in a state where water is accumulated in the drum. When the driving form is detected by the form detection unit before the body is rotated and the driving form is the biaxial driving form, the clutch mechanism unit may change the biaxial driving form to the uniaxial driving form. The drive mode is switched.

  According to the above configuration, before switching to the uniaxial driving mode is completed before the drum and the rotating body are rotated in the uniaxial driving mode in a state where water is stored, switching to the uniaxial driving mode is performed. Is done. Accordingly, it is possible to prevent the drum and the rotating body from being erroneously rotated by the biaxial drive mode, and to further prevent the drive unit from being defective.

  In the drum type washing machine according to the present aspect, a configuration further including a water level detection unit that detects the water level in the outer tub may be employed. In this case, when the water level detected by the water level detection unit after the start of rotation of the drum and the rotating body according to the uniaxial driving mode reaches a predetermined water level, the control unit causes the biaxial driving mode to The drum and the rotating body are started to rotate.

  According to the above configuration, the drum and the rotating body can be rotated by the biaxial drive mode in a state where the laundry in the drum is sufficiently wetted, and it is possible to further prevent the drive unit from being defective.

  In the drum type washing machine according to this aspect, the control unit supplies the drum and the rotating body according to the uniaxial drive mode to the drive unit after the drum is supplied to a state where the drum is immersed in the water in the outer tub. It can be set as the structure which starts rotation.

  According to said structure, it can prevent that a drum and a rotary body rotate in the state which the laundry cannot contact the water stored in the outer tub, and can prevent useless power consumption.

  In the drum type washing machine according to this aspect, in the rinsing step, the control unit is configured such that, in the state in which water is accumulated in the drum by water supply from the water supply unit, the drive unit is configured to perform the uniaxial drive mode. The drum and the rotating body may be rotated by the biaxial drive mode without rotating the drum and the rotating body.

  According to the above configuration, in the rinsing process in which the laundry is already wet, the drum and the rotating body are rotated from the beginning by the biaxial driving form without rotating the drum and the rotating body by the uniaxial driving form. Therefore, further improvement of the rinsing performance can be expected.

  ADVANTAGE OF THE INVENTION According to this invention, the drum type washing machine which can prevent generation | occurrence | production of malfunctions, such as a malfunctioning of a drive part, can be provided, improving a cleaning performance.

  The effects and significance of the present invention will become more apparent from the following description of embodiments. However, the following embodiment is merely an example when the present invention is implemented, and the present invention is not limited to what is described in the following embodiment.

It is side surface sectional drawing which shows the structure of the drum type washing machine based on embodiment. It is sectional drawing which shows the structure of the drive unit based on embodiment. It is sectional drawing which shows the structure of the drive unit based on embodiment. It is a front view of the rotor which shows the structure of the rotor of the drive motor based on Embodiment. It is an expansion perspective view of the rear part of the bearing unit in which the spline was formed based on embodiment. It is a figure which shows the structure of the clutch body of a clutch mechanism part based on embodiment. It is a block diagram which shows the structure of the drum type washing machine based on embodiment. It is a figure which shows the switching timing of the drive mode of the drive unit by a clutch mechanism part, and the drive timing of a drive motor in the washing operation based on embodiment. It is a flowchart which shows the control processing in the washing process based on Embodiment. It is a flowchart which shows the control processing in the rinse process based on embodiment. It is a flowchart which shows the control processing in the washing process based on the example of a change.

  Hereinafter, a drum type washing machine having no drying function according to an embodiment of the drum type washing machine of the present invention will be described with reference to the drawings.

  FIG. 1 is a side sectional view showing the configuration of the drum type washing machine 1.

  The drum-type washing machine 1 includes a housing 10 that forms an appearance. The front surface 10a of the housing 10 is inclined from the central portion to the upper portion, and the laundry inlet 11 is formed on the inclined surface. The insertion port 11 is covered with a door 12 that can be freely opened and closed.

  The outer tub 20 is elastically supported by a plurality of dampers 21 in the housing 10. A drum 22 is rotatably disposed in the outer tub 20. The outer tub 20 and the drum 22 are inclined with respect to the horizontal direction so that the rear surface side becomes lower. As a result, the drum 22 rotates around the tilt axis tilted with respect to the horizontal direction. The inclination angle of the outer tub 20 and the drum 22 can be about 10 to 20 degrees. The opening 20a on the front surface of the outer tub 20 and the opening 22a on the front surface of the drum 22 are opposed to the charging port 11, and both the charging port 11 is closed by the door 12. A large number of dewatering holes 22 b are formed on the inner peripheral surface of the drum 22. Further, three baffles 23 are provided on the inner peripheral surface of the drum 22 at substantially equal intervals in the circumferential direction.

  A stirring body 24 is rotatably disposed at the rear portion of the drum 22. The stirring body 24 has a substantially disk shape. A plurality of blades 24 a extending radially from the central portion are formed on the surface of the stirring body 24. The stirring body 24 rotates coaxially with the drum 22. The stirrer 24 corresponds to the rotating body of the present invention, and the blade 24a corresponds to the protruding portion of the present invention.

  A drive unit 30 that generates torque for driving the drum 22 and the stirring body 24 is disposed behind the outer tub 20. The drive unit 30 corresponds to the drive unit of the present invention. The drive unit 30 rotates the drum 22 and the stirring body 24 at different rotational speeds in the same direction during the washing process and the rinsing process. Specifically, the drive unit 30 rotates the drum 22 at a rotation speed at which the centrifugal force applied to the laundry in the drum 22 is smaller than gravity, and the stirring member 24 is faster than the rotation speed of the drum 22. Rotate with On the other hand, during the dehydration process, the drive unit 30 integrally rotates the drum 22 and the stirring body 24 at a rotational speed at which the centrifugal force applied to the laundry in the drum 22 is much greater than gravity. The detailed configuration of the drive unit 30 will be described later.

  A drain port 20 b is formed at the bottom of the outer tub 20. A drain valve 40 is provided at the drain port 20b. The drain valve 40 is connected to the drain hose 41. When the drain valve 40 is opened, the water stored in the outer tub 20 is discharged to the outside through the drain hose 41.

  A detergent box 50 is disposed in the upper front portion of the housing 10. In the detergent box 50, a detergent container 50a in which detergent is accommodated is accommodated so that it can be pulled out from the front. The detergent box 50 is connected by a water supply hose 52 to a water supply valve 51 disposed at the upper rear part in the housing 10. The detergent box 50 is connected to the upper part of the outer tub 20 by a water injection pipe 53. When the water supply valve 51 is opened, tap water is supplied from the water tap into the outer tub 20 through the water supply hose 52, the detergent box 50 and the water injection pipe 53. At this time, the detergent accommodated in the detergent container 50 a flows into the water and is supplied into the outer tub 20. The water supply valve 51 corresponds to a water supply unit of the present invention.

  Next, the configuration of the drive unit 30 will be described in detail.

  2 and 3 are cross-sectional views showing the configuration of the drive unit 30. FIG. FIG. 2 shows a state where the drive form of the drive unit 30 is switched to the biaxial drive form, and FIG. 3 shows a state where the drive form of the drive unit 30 is switched to the uniaxial drive form. FIG. 4 is a front view of the rotor 110 showing the configuration of the rotor 110 of the drive motor 100. FIG. 5 is an enlarged perspective view of the rear part of the bearing unit 500 in which the spline 514 is formed. 6A to 6C are diagrams showing the configuration of the clutch body 610 of the clutch mechanism portion 600, and are a front view, a right side view, and a rear view of the clutch body 610, respectively.

  The drive unit 30 includes a drive motor 100, a blade shaft 200, a drum shaft 300, a planetary gear mechanism 400, a bearing unit 500, and a clutch mechanism unit 600. The drive motor 100 generates torque for driving the stirrer 24 and the drum 22. The blade shaft 200 is rotated by the torque of the drive motor 100 and transmits the rotation to the stirring body 24. The planetary gear mechanism 400 decelerates the rotation of the blade shaft 200, that is, the rotation of the rotor 110 of the drive motor 100 and transmits it to the drum shaft 300. The drum shaft 300 rotates coaxially with the blade shaft 200 at a rotational speed reduced by the planetary gear mechanism 400 and transmits the rotation to the drum 22. The bearing unit 500 rotatably supports the blade shaft 200 and the drum shaft 300. The clutch mechanism 600 rotates the agitator 24, that is, the blade shaft 200 at a rotational speed equal to the rotational speed of the drive motor 100, and the drum 22, that is, the drum shaft 300, at a rotational speed reduced by the planetary gear mechanism 400. The two-shaft drive mode capable of rotating, and the agitator 24 and the drum 22, that is, the blade shaft 200, the drum shaft 300, and the planetary gear mechanism 400, can be integrally rotated at a rotational speed equal to that of the drive motor 100. The drive mode of the drive unit 30 is switched between possible uniaxial drive modes.

  The drive motor 100 is an outer rotor type DC brushless motor, and includes a rotor 110 and a stator 120. The rotor 110 is formed in a bottomed cylindrical shape, and permanent magnets 111 are arranged on the entire inner circumferential surface thereof. As shown in FIG. 4, a circular boss 112 is formed at the center of the rotor 110. A boss hole 113 for fixing the blade shaft 200 is formed in the boss part 112, and an annular engaged recess 114 is formed on the outer periphery of the boss hole 113. The outer peripheral part of the engaged recessed part 114 has the uneven | corrugated | grooved part 114a over the perimeter.

  The stator 120 has a winding 121 on the outer periphery. When a driving current is supplied to the winding 121 of the stator 120 from a motor driving unit described later, the rotor 110 rotates.

  The drum shaft 300 has a hollow shape and includes the blade shaft 200 and the planetary gear mechanism 400. The drum shaft 300 bulges outward at the center, and the bulged portion serves as a housing portion for the planetary gear mechanism 400.

  The planetary gear mechanism 400 includes a sun gear 410, an annular internal gear 420 surrounding the sun gear 410, a plurality of planetary gears 430 interposed between the sun gear 410 and the internal gear 420, and the planetary gears 430 rotating. And a planet carrier 440 that is freely held.

  The sun gear 410 is fixed to the blade shaft 200, and the internal gear 420 is fixed to the drum shaft 300. The set of planetary gears 430 includes a first gear and a second gear that mesh with each other and rotate in opposite directions. The planet carrier 440 includes a carrier shaft 441 extending rearward. The carrier shaft 441 is coaxial with the drum shaft 300, and the inside thereof is formed hollow because the blade shaft 200 is inserted.

  The rear end portion of the blade shaft 200 protrudes rearward from the carrier shaft 441 and is fixed to the boss hole 113 of the rotor 110.

  The bearing unit 500 is provided with a cylindrical bearing portion 510 at the center. Inside the bearing 510, rolling bearings 511 and 512 are provided at the front and rear, and a mechanical seal 513 is provided at the front end. An outer peripheral surface of the drum shaft 300 is received by the rolling bearings 511 and 512 and smoothly rotates in the bearing portion 510. Further, the mechanical seal 513 prevents water from entering between the bearing portion 510 and the drum shaft 300. As shown in FIG. 5, a spline 514 is formed on the inner surface of the rear end portion of the bearing portion 510 over the entire circumference.

  In the bearing unit 500, a fixed flange portion 520 is formed around the bearing portion 510. A mounting boss 521 is formed at the lower end of the fixed flange portion 520.

  The bearing unit 500 is fixed to the rear surface of the outer tub 20 by a fixing method such as screwing at the fixing flange portion 520. In a state where the drive unit 30 is mounted on the outer tub 20, the blade shaft 200 and the drum shaft 300 face the inside of the outer tub 20. The drum 22 is fixed to the drum shaft 300, and the stirring body 24 is fixed to the blade shaft 200.

  Clutch mechanism portion 600 includes a clutch body 610, a clutch spring 620, a clutch lever 630, a lever support portion 640, a clutch drive device 650, and a mounting plate 660.

  As shown in FIGS. 6A to 6C, the clutch body 610 has a substantially disk shape. An annular spline 611 is formed on the outer peripheral surface of the front end portion of the clutch body 610. The spline 611 is formed to engage with the spline 514 of the bearing unit 500. A flange portion 612 is formed on the outer peripheral surface of the clutch body 610 behind the spline 611. Further, the clutch body 610 is formed with an annular engagement flange portion 613 at the rear end. The engaging flange portion 613 has the same shape as the engaged recessed portion 114 of the rotor 110, and has an uneven portion 613a on the entire outer periphery. When the engaging flange portion 613 is inserted into the engaged concave portion 114, the concave and convex portions 613a and 114a are engaged with each other.

  A carrier shaft 441 is inserted into the shaft hole 614 of the clutch body 610. A spline 614 a formed on the inner peripheral surface of the shaft hole 614 engages with a spline 441 a formed on the outer peripheral surface of the carrier shaft 441. As a result, the clutch body 610 is allowed to move in the front-rear direction with respect to the carrier shaft 441 and is restricted from rotating in the circumferential direction.

  In the clutch body 610, an annular housing groove 615 is formed outside the shaft hole 614, and the clutch spring 620 is housed in the housing groove 615. The clutch spring 620 has one end in contact with the rear end portion of the bearing portion 510 and the other end in contact with the bottom surface of the housing groove 615.

  At the upper end portion of the clutch lever 630, a pressing portion 631 that contacts the rear surface of the flange portion 612 of the clutch body 610 and pushes the flange portion 612 forward is formed.

  The clutch lever 630 has a support shaft 632, and the support shaft 632 is rotatably supported by the lever support portion 640. A spring 641 is interposed between the clutch lever 630 and the lever support 640. The spring 641 is a tension spring, and the clutch lever 630 is pulled in the direction in which the lower end thereof moves forward by the elastic force of the spring 641.

  Clutch drive device 650 includes a torque motor 651 and a disc-shaped cam 652 that rotates around the horizontal axis by the torque of torque motor 651. The upper surface of the cam 652 comes into contact with the lower end portion of the clutch lever 630. The upper surface of the cam 652 has a first contact surface 652a with a high height provided on one end side, a second contact surface 652b with a low height provided on the other end side, and a first contact surface 652a and a second contact. And an inclined surface 652c connecting the surface 652b.

  The lever support 640 and the clutch driving device 650 are fixed to the mounting plate 660 by a fixing method such as screwing. The mounting plate 660 is fixed to the mounting boss 521 of the bearing unit 500 with screws.

  When the drive mode of the drive unit 30 is switched from the single-axis drive mode to the biaxial drive mode, as shown in FIG. 2, the first contact surface 652a is positioned upward and the second contact surface 652b is positioned by the torque motor 651. The cam 652 is rotated so as to be positioned below. As the cam 652 rotates, the lower end portion of the clutch lever 630 is sequentially pushed by the inclined surface 652c and the first contact surface 652a and moves rearward. The clutch lever 630 rotates forward about the support shaft 632, and the pressing portion 631 pushes the clutch body 610 forward. The clutch body 610 moves forward against the elastic force of the clutch spring 620, and the spline 611 of the clutch body 610 and the spline 514 of the bearing unit 500 are engaged.

  When the spline 611 and the spline 514 are engaged with each other, the clutch body 610 is restricted from rotating in the circumferential direction with respect to the bearing unit 500 and cannot rotate. Therefore, the carrier shaft 441 of the planetary gear mechanism 400, The planet carrier 440 is fixed so as not to rotate. In such a state, when the rotor 110 rotates, the blade shaft 200 rotates at a rotation speed equal to the rotation speed of the rotor 110, and the stirring body 24 connected to the blade shaft 200 also rotates at a rotation speed equal to the rotation speed of the rotor 110. Rotate with. As the blade shaft 200 rotates, the sun gear 410 rotates in the planetary gear mechanism 400. As described above, since the planet carrier 440 is in a fixed state, the first gear and the second gear of the planetary gear 430 rotate in the same direction and in the opposite direction to the sun gear 410, respectively, and the internal gear 420 is the sun gear. Rotate in the same direction as 410. As a result, the drum shaft 300 fixed to the internal gear 420 rotates in the same direction as the blade shaft 200 at a lower rotational speed than the blade shaft 200, and the drum 22 fixed to the drum shaft 300 is more than the stirrer 24. It rotates in the same direction as the stirring member 24 at a low rotational speed. In other words, the stirring member 24 rotates in the same direction as the drum 22 at a rotational speed faster than that of the drum 22.

  On the other hand, when the form of the drive unit 30 is switched from the biaxial drive form to the uniaxial drive form, the second contact surface 652b is positioned upward by the torque motor 651 as shown in FIG. The cam 652 is rotated so that is positioned below. As the cam 652 rotates, the lower end of the clutch lever 630 moves forward along the inclined surface 652c and the second contact surface 652b by the elastic force of the spring 641. The clutch lever 630 rotates backward about the support shaft 632, and the pressing portion 631 is separated from the flange portion 612 of the clutch body 610. The clutch body 610 is moved rearward by the elastic force of the clutch spring 620, and the engagement flange portion 613 of the clutch body 610 and the engaged recess 114 of the rotor 110 are engaged.

  When the engagement flange portion 613 and the engaged recess 114 are engaged, the rotation of the clutch body 610 in the circumferential direction with respect to the rotor 110 is restricted, and the clutch body 610 becomes rotatable with the rotor 110. In such a state, when the rotor 110 rotates, the blade shaft 200 and the clutch body 610 rotate at a rotational speed equal to the rotational speed of the rotor 110. At this time, in the planetary gear mechanism 400, the sun gear 410 and the planet carrier 440 rotate at the same rotational speed as the rotor 110. As a result, the internal gear 420 rotates at the same rotational speed as the sun gear 410 and the planet carrier 440, and the drum shaft 300 fixed to the internal gear 420 rotates at the same rotational speed as the rotor 110. That is, in the drive unit 30, the blade shaft 200, the planetary gear mechanism 400, and the drum shaft 300 rotate together. Thereby, the drum 22 and the stirring body 24 rotate integrally.

  FIG. 7 is a block diagram showing the configuration of the drum type washing machine 1.

  In addition to the configuration described above, the drum type washing machine 1 includes a control unit 701, a storage unit 702, an operation unit 703, a water level sensor 704, a motor drive unit 705, a water supply drive unit 706, a drainage drive unit 707, a clutch drive unit 708, and a door. A locking device 709 is provided.

  The operation unit 703 includes a power button 703a, a start button 703b, and a course selection button 703c. The power button 703 a is a button for turning on and off the power of the drum type washing machine 1. The start button 703b is a button for starting operation. The course selection button 703c is a button for selecting an arbitrary driving course from a plurality of driving courses related to the washing operation. The operation unit 703 outputs an input signal corresponding to the button operated by the user to the control unit 701.

  The water level sensor 704 detects the water level in the outer tub 20 and outputs a water level detection signal corresponding to the detected water level to the control unit 701. The water level sensor 704 corresponds to a water level detection unit of the present invention.

  The motor drive unit 705 supplies a drive current to the drive motor 100 in accordance with a control signal from the control unit 701. The water supply drive unit 706 supplies a drive current to the water supply valve 51 in accordance with a control signal from the control unit 701. The drain drive unit 707 supplies a drive current to the drain valve 40 in accordance with a control signal from the control unit 701.

  Clutch drive device 650 includes a first detection sensor 653 and a second detection sensor 654. The 1st detection sensor 653 and the 2nd detection sensor 654 are equivalent to the form detection part of the present invention. The first detection sensor 653 detects that the drive mode of the drive unit 30 has been switched to the biaxial drive mode, and outputs a detection signal to the control unit 701. The second detection sensor 654 detects that the drive mode of the drive unit 30 has been switched to the uniaxial drive mode, and outputs a detection signal to the control unit 701. The clutch drive unit 708 supplies a drive current to the torque motor 651 in accordance with a control signal output from the control unit 701 based on detection signals from the first detection sensor 653 and the second detection sensor 654.

  The door lock device 709 locks and unlocks the door 12 according to a control signal from the control unit 701.

  The storage unit 702 includes an EEPROM, a RAM, and the like. The storage unit 702 stores programs for executing washing operations of various washing operation courses. The storage unit 702 stores various parameters and various control flags used for executing these programs.

  The control unit 701 is based on each signal from the operation unit 703, the water level sensor 704, etc., and according to a program stored in the storage unit 702, a motor driving unit 705, a water supply driving unit 706, a drainage driving unit 707, and a clutch driving unit 708. Control the door lock device 709 and the like.

  The drum type washing machine 1 performs a washing operation of various operation courses based on a user's selection operation by the course selection button 703c. In the washing operation, a washing process, an intermediate dehydration process, a rinsing process, and a final dehydration process are sequentially performed. Depending on the operation course, the intermediate dehydration step and the rinsing step may be performed twice or more.

  FIG. 8 is a diagram illustrating the switching timing of the drive mode of the drive unit 30 by the clutch mechanism unit 600 and the drive timing of the drive motor 100 in the washing operation.

  The drive mode of the drive unit 30 is switched to the uniaxial drive mode by switching the drive mode before the final dehydration step in the previous washing operation before the washing operation is started. When the washing operation is started, the drive mode is continuously maintained in the uniaxial drive mode until the water supply process is completed. The operation of the drive motor 100 is started from the middle of water supply, and the drum 22 and the stirring body 24 rotate integrally. The rotational speed of the drum 22 and the stirring member 24 at this time is set to a rotational speed at which the centrifugal force acting on the laundry in the drum 22 is smaller than gravity. The drive motor 100 rotates alternately clockwise and counterclockwise, and the drum 22 and the stirring member 24 rotate clockwise and counterclockwise alternately. The laundry in the drum 22 is stirred by the baffle 23 and touches the water accumulated in the drum 22. When the laundry becomes wet, the bulk of the laundry in the drum 22 is reduced, and the friction coefficient of the laundry is reduced.

  When the water supply process is completed, the drive mode is switched from the uniaxial drive mode to the biaxial drive mode. The operation of the drive motor 100 is stopped for the time required for switching. When the switching is completed, the washing process is started and the drive motor 100 is operated again. The drum 22 and the stirring body 24 rotate separately in the same direction. At this time, the drum 22 rotates at the same rotational speed as in the uniaxial drive mode, and the agitator 24 rotates alternately at the left and right at a rotational speed faster than the drum 22. The laundry in the drum 22 is beaten against the inner peripheral surface of the drum 22 by being scraped and dropped by the baffle 23. In addition, at the rear part of the drum 22, the laundry comes into contact with the blades 24a of the rotating stirring body 24, and the laundry is rubbed against the blades 24a or the laundry is stirred by the blades 24a. Thereby, the laundry is washed. The mechanical force applied to the laundry is increased as compared with the tapping washing using only the baffle 23, and the movement of the laundry in the drum 22 becomes more active, so that improvement in the cleaning performance can be expected.

  When rotation of the drum 22 and the stirring body 24 in the biaxial drive mode is started, the bulk and friction coefficient of the laundry are reduced, so when the stirring body 24 comes into contact with the laundry, the stirring body 24 Is not overloaded. Therefore, the drive motor 100 is prevented from being locked.

  When the washing process is finished, the operation of the drive motor 100 is stopped. The draining process is performed while the drive form is maintained in the biaxial drive form. When the draining process is completed, the drive mode is switched from the biaxial drive mode to the uniaxial drive mode. When the switching is completed, the process proceeds to the intermediate dehydration process. The switching from the biaxial drive mode to the uniaxial drive mode may be performed before the draining process.

  In the intermediate dehydration step, when the drive motor 100 operates, the drum 22 and the stirring body 24 rotate integrally at a rotational speed at which the centrifugal force acting on the laundry in the drum 22 is much greater than gravity. By the action of centrifugal force, the laundry is pressed against the inner peripheral surface of the drum 22 and dehydrated.

  When the intermediate dehydration step is completed, a rinsing step is subsequently performed. Prior to the water supply step in the rinsing step, the drive mode is switched from the uniaxial drive mode to the biaxial drive mode. The drive motor 100, which has been stopped once dehydration has finished, operates again with the start of water supply after the completion of switching. The drum 22 and the stirrer 24 rotate separately clockwise and counterclockwise in the water supply process and the rinsing process, as in the washing process.

  As in the washing process, the laundry in the drum 22 is struck against the inner peripheral surface of the drum 22 by stirring by the baffle 23, and is rubbed against the blades 24a of the stirring body 24, or the laundry is stirred by the blades 24a. . Thereby, the laundry is rinsed.

  Since the mechanical force applied to the laundry increases and the movement of the laundry in the drum 22 is activated, an improvement in rinsing performance can be expected. In particular, in the rinsing process, although the dehydration is performed by the intermediate dehydration process, the laundry is in a wet state, so that the drive motor 100 is hardly locked. Therefore, in the rinsing process, the drum 22 and the agitator 24 are rotated in the biaxial drive form from the water supply process without rotating the drum 22 and the agitator 24 in the uniaxial drive form in advance. For this reason, further improvement in the rinsing performance can be expected.

  When the rinsing process is completed, the operation of the drive motor 100 is stopped. The draining process is performed while the drive form is maintained in the biaxial drive form. When the draining process is completed, the drive mode is switched from the biaxial drive mode to the uniaxial drive mode. When the switching is completed, the process proceeds to the final dehydration process. The switching from the biaxial drive mode to the uniaxial drive mode may be performed before the draining process.

  In the final dewatering step, as in the intermediate dewatering step, the drum 22 and the stirrer 24 are integrally rotated at a high speed, and the laundry is dewatered. In the final dehydration process, the dehydration time is longer than in the intermediate dehydration process, and the rotation speed of the drum 22 and the stirring member 24 is increased.

  When the final dehydration process is finished, the washing operation is finished.

  Next, control processing by the control unit 701 in the washing process and the rinsing process will be described in detail with reference to FIGS. 9 and 10.

  FIG. 9 is a flowchart showing a control process in the washing process.

  When the washing process is started, the control unit 701 determines whether or not the drive mode of the drive unit 30 is a uniaxial drive mode based on the detection result of the second detection sensor 654 (S101). Normally, since the switching to the uniaxial drive mode is performed during the final dehydration process in the previous washing operation, the uniaxial drive mode is maintained at the start of the current washing operation. Therefore, if the control part 701 determines with a drive form being a uniaxial drive form (S101: YES), it will open the water supply valve 51 (S102). Thereby, water supply into the outer tub 20 is started, and water containing a detergent is supplied into the outer tub 20.

  On the other hand, when the drive mode is not switched to the single-axis drive mode due to some trouble (S101: NO), the control unit 701 operates the torque motor 651 of the clutch mechanism unit 600 to switch the drive mode to the single-axis drive mode. (S103). When the switching to the uniaxial drive mode is confirmed based on the detection result of the second detection sensor 654, the control unit 701 opens the water supply valve 51 (S102).

  Next, the control unit 701 determines whether the water level in the outer tub 20 has reached the stirring water level based on the detection result of the water level sensor 704 (S104). The stirring water level is a water level that is determined in advance as a water level at which the drum 22 and the stirring body 24 start to rotate, and is a water level at which the peripheral surface of the drum 22 is immersed in water, and is a water level lower than a washing water level described later. The

  When the water level in the outer tub 20 reaches the stirring water level (S104: YES), the control unit 701 operates the drive motor 100 (S105). The drum 22 and the agitator 24 are rotated together at a low speed, and the laundry in the drum 22 is agitated while being in contact with the accumulated water and wetted with water.

  When a predetermined water supply time has elapsed (S106: YES), the control unit 701 stops the drive motor 100 and closes the water supply valve 51 (S107). Based on the detection result of the water level sensor 704, the control unit 701 determines whether or not the water level in the outer tub 20 has reached a predetermined wash water level (S108). When the laundry has a large capacity and a lot of water is absorbed by the laundry, it is difficult to reach the washing water level in one water supply time. If the water level in the outer tub 20 has not reached the wash water level (S108: NO), the control unit 701 opens the water supply valve 51 again (S109) and operates the drive motor 100 (S105). In this way, the processes in steps S105 to S109 are repeated until the water level in the outer tub 20 reaches the washing water level. When the water level in the outer tub 20 reaches the washing water level, the laundry in the drum 22 is sufficiently evenly wet.

  When the water level in the outer tub 20 reaches the washing water level (S108: YES), the control unit 701 operates the torque motor 651 to switch the drive mode of the drive unit 30 to the biaxial drive mode (S110). When the switching to the biaxial drive mode is confirmed based on the detection result of the first detection sensor 653, the control unit 701 operates the drive motor 100 (S111). The drum 22 is at a low speed and the stirring member 24 is rotated at a speed higher than that of the drum 22, and the laundry in the drum 22 is washed by a high mechanical force and a detergent force.

  When a predetermined washing time has elapsed (S112: YES), the control unit 701 stops the drive motor 100 (S113). Then, the control unit 701 opens the drain valve 40 (S114). The water in the outer tub 20 is discharged out of the machine.

  The control unit 701 determines whether or not the drainage is completed (S115). For example, the control unit 701 determines that the drainage is completed when a predetermined time has elapsed after the water level in the outer tub 20 reaches the lower limit water level that can be measured by the water level sensor 704. When the controller 701 determines that the drainage is completed (S115: YES), the controller 701 closes the drain valve 40 (S116). Then, the control unit 701 operates the torque motor 651 to switch the drive mode of the drive unit 30 to the uniaxial drive mode (S117). Thus, the control process of the washing process is completed.

  FIG. 10 is a flowchart showing the control process in the rinsing process.

  When the rinsing process is started, the control unit 701 operates the torque motor 651 to switch the drive mode of the drive unit 30 to the biaxial drive mode (S201). When the switching to the biaxial drive mode is confirmed based on the detection result of the first detection sensor 653, the control unit 701 opens the water supply valve 51 and operates the drive motor 100 (S202). While the water is fed into the outer tub 20, the drum 22 is rotated at a low speed and the stirring member 24 is rotated at a higher speed than the drum 22, and the laundry in the drum 22 is rinsed by a high mechanical force.

  When a predetermined water supply time elapses (S203: YES), the controller 701 stops the drive motor 100 and closes the water supply valve 51 (S204). The control unit 701 determines whether or not the water level in the outer tub 20 has reached a predetermined rinse water level based on the detection result of the water level sensor 704 (S205). If the water level in the outer tub 20 has not reached the washing water level (S108: NO), the control unit 701 opens the water supply valve 51 and operates the drive motor 100 again (S202). In this way, the processes in steps S202 to S205 are repeated until the water level in the outer tub 20 reaches the rinse water level.

  When the water level in the outer tub 20 reaches the rinse water level (S205: YES), the control unit 701 operates the drive motor 100 (S206). With the water supply stopped, the laundry is continuously rinsed.

  When a predetermined washing time has elapsed (S207: YES), the control unit 701 stops the drive motor 100 (S208). Then, the control unit 701 opens the drain valve 40 (S209). The water in the outer tub 20 is discharged out of the machine.

  When draining is completed (S210: YES), the control unit 701 closes the drain valve 40 (S211). Then, the control unit 701 operates the torque motor 651 to switch the drive mode of the drive unit 30 to the uniaxial drive mode (S212). Thus, the control process of the rinsing process is completed.

<Effect of Embodiment>
As described above, according to the present embodiment, in the washing process and the rinsing process, the drum 22 and the stirring body 24 rotate so that the rotation speed of the stirring body 24 is faster than the rotation speed of the drum 22. Thereby, the laundry in the drum 22 is not only struck by the inner peripheral surface of the drum 22 by the stirring by the baffle 23, but is also rubbed by the blades 24a of the rotating stirring body 24. Therefore, compared with the structure in which the laundry is only stirred by the baffle 23, the cleaning performance and the rinsing performance can be improved.

  Further, according to the present embodiment, the drum 22 and the agitator 24 are integrally rotated by the uniaxial drive mode in a state where water is accumulated in the drum 22, and the laundry is wetted with the water in the drum 22. After reducing the bulk and friction coefficient of the laundry, the drum 22 and the agitator 24 are separately rotated by the biaxial drive mode. Thereby, it can prevent that the excessive load by the laundry is applied to the stirring body 24, and the lock of the drive motor 100 can be prevented. Moreover, the pain of the laundry by the strong rubbing with the stirring body 24 can be prevented.

  Furthermore, according to the present embodiment, before the drum 22 and the stirring body 24 are rotated in the uniaxial drive mode in a state where water is stored, it is determined whether or not the switching to the uniaxial drive mode is completed. If it is detected and switching is not completed, switching to the single-axis drive mode is performed. Thereby, it can prevent that the drum 22 and the stirring body 24 by a biaxial drive form rotate accidentally, and can prevent the drive motor 100 from being locked further.

  Furthermore, according to the present embodiment, the drum 22 and the stirring body 24 are rotated by the uniaxial drive mode until the water level in the outer tub 20 reaches the washing water level. The drum 22 and the stirrer 24 can be rotated by the biaxial drive mode in a state where the object is sufficiently wet, and the lock of the drive motor 100 can be further prevented.

  Further, according to the present embodiment, after the water level in the outer tub 20 reaches the stirring water and the drum 22 is immersed in water, the drum 22 and the stirring body 24 are rotated by the temporary drive mode. Therefore, it is possible to prevent the drum 22 and the agitator 24 from rotating in a state where the laundry cannot contact the water stored in the outer tub 20, and wasteful power consumption can be prevented.

  Furthermore, according to the present embodiment, in the rinsing process in which the laundry of the laundry is already wet and the drive motor 100 is unlikely to be locked, the water supply can be performed without rotating the drum 22 and the agitator 24 in the uniaxial drive mode. Since the drum 22 and the stirrer 24 are rotated by the two-shaft drive mode from the above step, further improvement of the rinsing performance can be expected.

<Example of change>
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and the like, and various modifications can be made to the embodiments of the present invention in addition to the above. is there.

  For example, in the said embodiment, the water injection port of the water injection pipe 53 may face directly in the drum 22, and the structure by which water is supplied from the water injection port in the shape of a shower toward the laundry in the drum 22 may be taken. . In this case, since the laundry can be wetted even if the drum 22 is not immersed in the water in the outer tub 20, the process of step S104 for detecting the stirring water level in the control process shown in FIG. 11 is deleted. When the water supply valve 51 is opened as in the control processing shown in FIG.

  Furthermore, in the above embodiment, after the water level in the outer tub 20 reaches the washing water level, the rotation of the drum 22 and the stirring body 24 in the biaxial drive mode is started. However, the present invention is not limited to this, and a configuration may be adopted in which rotation of the drum 22 and the stirring body 24 in the biaxial drive mode is started after the first water supply time has elapsed.

  Furthermore, in the above embodiment, when the washing time and the rinsing time have elapsed, the drive motor 100 is stopped. However, a configuration in which the drive motor 100 is stopped after the draining process may be adopted.

  Further, in the above-described embodiment, in the rinsing process, the rotation of the drum 22 and the stirring body 24 in the biaxial drive mode is started simultaneously with the start of the water supply process. However, the rotation of the drum 22 and the stirring body 24 in the biaxial drive mode is started from the middle of the water supply process or after the water level in the outer tub 20 reaches the rinse water level and shifts to the rinse process. May be taken.

  Furthermore, in the above-described embodiment, the drum 22 rotates around the tilt axis tilted with respect to the horizontal direction. However, the drum type washing machine 1 may be configured such that the drum 22 rotates about the horizontal axis.

  Furthermore, although the drum type washing machine 1 of the above embodiment does not have a drying function, the present invention can also be applied to a drum type washing machine having a drying function, that is, a drum type washing and drying machine.

  In addition, the embodiment of the present invention can be variously modified as appropriate within the scope of the technical idea shown in the claims.

10 housing
20 Outer tank
22 drums
24 Stirring body (rotating body)
24a Feather (projection)
30 Drive unit (drive unit)
51 Water supply valve (Water supply part)
600 Clutch mechanism
653 1st detection sensor (form detection part)
654 Second detection sensor (form detection unit)
701 control unit
704 Water level sensor (water detector)

Claims (4)

In a drum-type washing machine that performs a washing operation including a washing step, a rinsing step, and a dehydration step,
An outer tub disposed in the housing;
A water supply unit for supplying water into the outer tub;
A drum arranged in the outer tub and rotatable around a horizontal axis or an inclined axis inclined with respect to the horizontal direction;
A rotating body disposed at the rear of the drum and having a protrusion on the surface that contacts the laundry;
A biaxial drive mode in which the drum and the rotating body are rotated separately so that the rotating speed of the rotating body is higher than the rotating speed of the drum, and the rotating speed of the rotating body is equal to the rotating speed of the drum. A drive unit capable of rotating the drum and the rotating body by a uniaxial driving mode in which the drum and the rotating body are rotated integrally;
A control unit for controlling the operation of the drive unit,
The driving unit includes a clutch mechanism unit that switches a driving mode of the driving unit between the biaxial driving mode and the uniaxial driving mode, and a mode detecting unit that detects the driving mode,
The controller is
In the washing step, before causing the rotation of the by the biaxial drive form prior SL driver drum and the rotating member, in a state where water is accumulated in said drum by the water supply from the water supply unit, wherein Causing the driving unit to rotate the drum and the rotating body according to the uniaxial driving mode ;
At the end of the washing operation, the clutch mechanism is operated so as to be switched to the uniaxial drive mode,
Before the rotation of the drum and the rotating body in a state where water is accumulated in the drum, the form detection unit detects the drive form, and when the drive form is the biaxial drive form, the clutch Have the mechanism switch the drive mode from the biaxial drive mode to the uniaxial drive mode,
A drum-type washing machine characterized by that. In a drum-type washing machine that performs a washing operation including a washing step, a rinsing step, and a dehydration step,
An outer tub disposed in the housing;
A water supply unit for supplying water into the outer tub;
A drum arranged in the outer tub and rotatable around a horizontal axis or an inclined axis inclined with respect to the horizontal direction;
A rotating body disposed at the rear of the drum and having a protrusion on the surface that contacts the laundry;
A biaxial drive mode in which the drum and the rotating body are rotated separately so that the rotating speed of the rotating body is higher than the rotating speed of the drum, and the rotating speed of the rotating body is equal to the rotating speed of the drum. A drive unit capable of rotating the drum and the rotating body by a uniaxial driving mode in which the drum and the rotating body are rotated integrally;
A control unit for controlling the operation of the drive unit,
The controller is
In the washing step, the drive is performed in a state where water is collected in the drum by water supply from the water supply unit before the drive unit rotates the drum and the rotating body according to the biaxial drive mode. To rotate the drum and the rotating body according to the uniaxial drive mode,
In the rinsing step, in the state where water is accumulated in the drum by the water supply from the water supply unit, the biaxial shaft can be operated without causing the drive unit to rotate the drum and the rotating body according to the uniaxial drive mode. Causing the drum and the rotating body to rotate according to a drive mode;
A drum-type washing machine characterized by that. In the drum type washing machine according to claim 1 or 2,
A water level detection unit for detecting the water level in the outer tub,
When the water level detected by the water level detector after the start of rotation of the drum and the rotating body according to the uniaxial drive mode reaches a predetermined water level, the control unit causes the drum according to the biaxial drive mode to And starting the rotation of the rotating body,
A drum-type washing machine characterized by that. In the drum type washing machine according to any one of claims 1 to 3,
The control unit causes the driving unit to start rotation of the drum and the rotating body according to the uniaxial driving mode after water is supplied until the drum is immersed in the water in the outer tub.
A drum-type washing machine characterized by that.

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